Substation and Power Transformers
supertran delivers medium to high voltage substation and power transformers with lead times under 12 months, and distribution class units in as little as 16 weeks.
Built to IEEE/ANSI standards, our transformers feature high-quality construction with mitered cruciform cores and cylindrical windings.
Applications include Oil & Gas, Industrial, Solar, Utility, Data Center, and Commercial sectors.
FROM 5kV
TO 850kV
Overview
As data center expansion and AI-driven load growth reshape today’s grid, supertran supplies high-performance substation and power transformers built for the evolving demands of modern energy infrastructure. Ranging from 5 kV to 850 kV, our transformers are engineered to IEEE or IEC standards depending on project requirements and are fully customizable for utility, industrial, renewable, and commercial applications.
With fast lead times, robust mechanical design, and high-grade materials such as mitered cruciform cores and circular copper windings, supertran transformers deliver long-term reliability, thermal efficiency, and expert customer support. We offer expert witness testing and detailed reports prior to shipment, and our team supports your project by overseeing assembly, installation, and testing - or handling it directly - for a smooth, on-site deployment.
Standard Design and Options
Construction
Copper Windings
Reliable longevity
K9, K13
For increased Harmonics (K rating estimating)
3, 4, 5 Windings
Lower secondary amps, drives, special applications
Galvanized or Stainless
Better corrosion resistance
Valved removable radiators
Good for maintenance planning
Full Length ATC
Bottom sits on the slab, same as tank
Flange for bushings
Similar to throat, typically full length, for close coupling
ONAN/ONAF
Forced Air rated kVA Fans increase the maximum kVA
KNAN/KNAF
FR3 Cooling and Ambient Air
Fluid
FR3 vegetable oil
KNAN cooling, High flash point, and more advantages.
Standard Gauge & Accessory Package
Optional Design Features & Accessories
2 Stages of Fan Cooling
ONAN/ONAF/ONAF or KNAN/KNAF/KNAF for higher capacity
LV cable supports
To provide support heavy cables, standard on 12-hole spades
Sudden Pressure Rise Relay
Cover Mounted Pressure Release Device
Electrostatic Shield
To mitigate voltage transients and anomalies generated to the source. Commonly used with K rating, and Drive isolation transformers.
Oil level gauge w/contacts
Wired to external control box
Oil temp gauge w/contacts
Wired to external control box
Pressure Vacuum Gauge w/contacts
Wired to external control box
K Rating Information To Consider
According to IEEE C57.110
- Computer Data Centers K Factor should be between 3.5 – 4.
- UPS Systems K Factor should be between 3.0 – 3.8.
- Fluorescent Lighting should be between 2.0 – 2.5.
According to IEC 60076-7
- Variable Frequency Drives should be between 4.0 – 5.5.
- Arc Furnaces should be between 5.0 – 6.5.
- Industrial Drives should be between 4.0 – 5.0.
K9 is commonly used for 6 pulse drives.
The values shown above are for quick reference. We are available to help determine the appropriate K Rating based on your loads and system configuration. Additional K rating results in improved efficiency in most cases.
Our Promise
Exceptional
quality
We implement strict quality control measures at every stage of production to ensure our products meet or exceed industry standards.
Custom-Built
Excellence
From FR3 to upgraded insulation options, we offer tailored builds to meet your cooling, environmental, and safety requirements.
Dedicated support
We arrange responsive service, technical expertise, and reliable warranty support, all from a U.S.-based team.
Comprehensive
warranty
We stand behind our products with a robust warranty that covers both materials and workmanship.
Competitive
pricing
We deliver exceptional value so you receive top-tier, reliable, high-quality products without the premium price tag.
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Substation Transformer
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